func(error) error: is a new handler signature

Author: lainio

README.md

@@ -24,9 +24,9 @@ func CopyFile(src, dst string) (err error) {
 	if err != nil {
 		return fmt.Errorf("mixing traditional error checking: %w", err)
 	}
-	defer err2.Handle(&err, func() {
+	defer err2.Handle(&err, err2.Err(func(error) {
 		os.Remove(dst)
-	})
+	}))
 	defer w.Close()
 	try.To1(io.Copy(w, r))
 	return nil

doc.go

@@ -34,9 +34,9 @@ them. The CopyFile example shows how it works:
 	     w := try.To1(os.Create(dst))
 	     // Add error handler to clean up the destination file. Place it here that
 	     // the next deferred close is called before our Remove call.
-	     defer err2.Handle(&err, func() {
+	     defer err2.Handle(&err, err2.Err(func(error) {
 	     	os.Remove(dst)
-	     })
+	     }))
 	     defer w.Close()
 
 	     // Try to copy the file. If error occurs now, all previous error handlers

scripts/functions.sh

@@ -467,7 +467,7 @@ todo_handle_func() {
 
 todo_catch_func() {
 	dlog "searching old error handlers"
-	ag 'err2\.Catch\(func\(err error\)'
+	ag 'err2\.Catch\(func\(err error\) \{'
 }
 
 lint() {

try/try.go

@@ -9,8 +9,9 @@ about err2 and try packager roles can be seen in the FileCopy example:
 	defer r.Close()
 
 	w := try.To1(os.Create(dst))
-	defer err2.Handle(&err, func() {
-	     os.Remove(dst)
+	defer err2.Handle(&err, func(error) error {
+	     try.To(os.Remove(dst)).Logf()
+		return nil
 	})
 	defer w.Close()
 	try.To1(io.Copy(w, r))

try/try_test.go

@@ -111,9 +111,9 @@ func Example_copyFile() {
 		defer r.Close()
 
 		w := try.To1(os.Create(dst))
-		defer err2.Handle(&err, func() {
+		defer err2.Handle(&err, err2.Err(func(error) {
 			os.Remove(dst)
-		})
+		}))
 		defer w.Close()
 		try.To1(io.Copy(w, r))
 		return nil